Just received some information from ComCom, plus Telecom's comments, and posted here.

Basically:

Telecom New Zealand Limited has pleaded guilty to 17 charges of breaching the Fair Trading Act over claims made in 2006 when promoting Xtra’s Go Large broadband plan. Telecom has been fined $500,000 in the Auckland District Court today.

From August to November 2006 Telecom and Xtra undertook an extensive nationwide advertising campaign to promote the Go Large broadband plan and made a number of representations, including ‘“Xtra Broadband is about to be unleashed!”, “unlimited data usage and all the internet you can handle” and “maximum speed internet”.

In December 2006 the Commission launched an investigation following complaints from Xtra customers who found that the internet speed was constrained, in some cases to dial-up speed. Some customers also found that they experienced slower speeds on their new Go Large plan than on their previous plans.

The overall impression of the campaign was that the Go Large plan was unique in that it would offer unconstrained faster speeds and no data caps. However further details available in the fine print of advertising and on Telecom’s website gave the disclaimer ‘as fast as a user’s line will allow’ and outlined the possibility of constraints which included a ‘traffic management policy’ for use during peak times and for those using peer-to-peer applications, such as downloading music and movies.

The Commission established that a change made in early December 2006 to how the Go Large plan was administered meant that the traffic management policy applied at all times and across all applications, not just to peer-to-peer traffic. This meant that in some cases customers were not experiencing unconstrained speeds.

“Telecom has co-operated fully with the Commission’s investigation and has voluntarily paid around $8.4 million in compensation to approximately 97,000 affected customers. Telecom will pay a further $44,000 in reparation to 1,700 eligible Go Large customers. Telecom stopped offering the Go Large plan to new customers in February 2007,” said Mr Gill.